I think it's more like every engineer will either become like a lead or a principal or have problems. I'm a principal. I have for years had multiple teams building things that I prototyped designed or worked with them on the specs for. There's a level of touch and letting go that you have to employ to not over burden them or you getting bogged down in details that don't matter and missing those that do.
One of the skills I've developed is spinning (back) up on problems quickly while holding the overall in my head. I find with AI I'm just doing that even more often and I now have 5 direct reports (AI) added to the 6 teams of 8 I work with through managers and roadmaps.
I think there is one big difference that will differentiate between principal/lead devs and euqally experienced senior devs working with AI.. AIs are not people. Lead/principal developers are good at delegating work to, and managing, people. People and AIs have very little in common and I don't think the skills will really translate that well. I think the people who will really shine with AI are those at the principal level of skill but who are better with computers than people. They will be able to learn the AI system interaction skills without first having to unlearn all the people interaction skills and I'm not sure if the "leadership skills" that are prized in principal devs can even be unlearned they seem to be more a natural affinity than a skill.
One of the skills I've developed is spinning (back) up on problems quickly while holding the overall in my head. I find with AI I'm just doing that even more often and I now have 5 direct reports (AI) added to the 6 teams of 8 I work with through managers and roadmaps.